4 890 133 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
29340799	8	24.8	old
638133015703	12	39.2	2008-09-08 00:18:48
75228089600841562351	20	66.0	2019-07-22 20:13:50

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	3EF8E503B29FFED9	2	0	1	3
Verified (Factored)	2018-04-03	Oliver Kruse	3EF8E503B29FFED9	2	4825725	1	3
Verified	2019-07-23	ANONYMOUS	28052AF083542A20	3	2248927	5	3
Verified	2019-07-24	kkmrkkblmbrbk	28052AF083542A20	3	2768070	5	3

History

Date	User	Type	Result
2023-09-09	USAFSS	NF-PM1	B1=256000, B2=105522060
2019-07-24	kkmrkkblmbrbk	C-PRP	M4890133/29340799/638133015703/75228089600841562351 : 28052AF083542A20 PRP: Verified PRP without proof (not generated)
2019-07-23	ANONYMOUS	C-PRP	M4890133/29340799/638133015703/75228089600841562351 : 28052AF083542A20 PRP: Verified PRP without proof (not generated)
2019-07-22	MarkS	F-ECM	Factor: 75228089600841562351 / (ECM curve 2, B1=50000, B2=5000000)
2018-04-03	Oliver Kruse	C-PRP	M4890133/29340799/638133015703 : 3EF8E503B29FFED9 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4890133/29340799/638133015703 : 3EF8E503B29FFED9 PRP: Verified PRP without proof (not generated)
2008-09-08	Will Edgington	F	Factor: 638133015703